Bitcoin Up or Down on August 11?

Platform comparison

Market context

Polymarket's conditional token structure prices this intraday Bitcoin move at 28% probability of upside, reflecting the market's baseline expectation that BTC/USDT will close lower on 11 August than it did at noon on 10 August. The settlement mechanism ties directly to Binance's 1-minute candle closes at the 12:00 ET timestamp—a narrow window that eliminates most macroeconomic noise and isolates pure 24-hour price momentum. Traders holding YES tokens effectively bet on a single-day rally; those holding NO tokens profit from stagnation or decline. The USDC collateral backing these conditional tokens settles on Polygon, meaning resolution occurs on-chain within hours of the 16:00 UTC deadline.

Historical precedent suggests single-day Bitcoin moves of meaningful magnitude occur roughly 35–40% of trading days, though noon-to-noon windows capture less volatility than full 24-hour periods. The current 28% probability sits below this baseline, indicating the crowd perceives structural headwinds or recent price weakness. August 2026 lacks scheduled Federal Reserve announcements or major cryptocurrency exchange events on the resolution date itself, reducing catalyst-driven volatility. Traders should monitor overnight Asian trading sessions (particularly Shanghai and Tokyo hours) on 10–11 August, as these often establish momentum that carries into US market open. Any significant movement in traditional equities or US dollar strength during this window could suppress Bitcoin's ability to rally intraday.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.